Cold Rolling Texture of Heavy Rolled 50 Pct Ni-Fe Thin Sheets

概要

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In order to clarify the cold rolling texture of heavy rolled ultra-thin sheets of 50 pct Ni-Fe alloy, the effect of extremely high reduction and final thickness of sheets on the texture and the variation of textures through the thickness have been investigated. It has been recognized that the rolling textures of this alloy indicate to be copper-type up to this time. However, it could not be simply described as copper-type and show the peculiar textures under such an extreme rolling condition. The results obtained are summarized as follows : (1) The center textures up to 99.4 pct reduction and in the thicker sheets than 20 μ in thickness show the sharp copper-type. (2) After much higher reduction than 99.4 pct, {110} <112> component decreases and (112) <111> component increases and such tendency is more remarkable in thinner sheets and the surface layer. (3) After much higher reduction than 99.9 pct, weak {110} <335> and {110} <100> component increase slowly with increase of reduction and is stronger in the surface layer. (4) Very weak {100} <001> component exists in deformed matrix, but after heavy reduction more than 99.4 pct and in thinner sheets than 20 μ, this component decreases still more. (5) The integrated intensity of {100} <001> in deformed matrix corresponds to numbers of {100} <001> in the recrystallized nuclei. From the above results the mechanisms of texture formation in ultra-thin sheets are discussed.
東北大学の論文